Steam-engine.



J. M. PARSUNS, DECD. M. E. nnsous, ADMINISTBATRIX.

STEAM ENGINE. APPLIOATIUN FILED PEB. 1s, 1911.

Patented Aug. 27, 1912.

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STEAM ENGINE.

APPLIoATIoN FILED 2.23.18, 1911.

Patented Aug. 27,` 1912.

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J. M. PARSONS, DEGD. M. B. PARSONS, ADMINISTRATBIX.

STEAM ENGINE.

APPLIoATIoN FILED PEB. 1s. 1911.

Patented Aug. 27, 1912.

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J. M. PARSONS, DEGD. M. E. PARsoNs, AJJMINIHTBATBIX.

STEAM BNG1NB. APPLI'oATIoN FILED FEB. 1a, 1911.

1,036,895. Patented Aug. 27, 1912.

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UAMES M. PARsONs, DRcRAsnD, LATE or BALTIMORE, MARYLAND, RY MARY E.rARsONs, ADMINIsTRATRrX, or BALTIMORE, MARYLAND.

STEAM-ENGINE.

Specification of Letters Patent.

Patented Aug. 27, 1912.

AppIcation led February 18, 1911. Serial No. 609.528.

To all whom t may concern:

Be it known that JAMES M. PAnsoNs, deceased, late a citizen of theUnited States, residing at Baltimore, State of Maryland, did inventcertain new and useful Improvements in Steam-Engines, of which thefollowing is a specification.

This invention relates to improvements 1n steam engines, andparticularly to improved piston and cylinder construction andarrangement.

The Object in view is the arrangement in a steam engine, ofreciprocating cylinders and stationary pistons, associated with co-actmgmechanism for securing a maximum power from the engine with a minimumuse of steam.

Another object in view is the provision of pistons with hollow pistonrods through which the steam is passed into and out of the cylinder, thepiston rods being stationary and not requiring the use of packing of anykind.

A further object of the invention is the provision of a plurality ofreciprocating cylinders acting in pairs, the cylinders being associatedwith slide valves arranged to preferably slide simultaneously and in thesame direction as the cylinder.

With these and other objects in view the invent-ion comprises certainnovel constructions, combinations, and arrangements of parts as will behereinafter more fully described and claimed.

In the accompanying drawings: Figure 1 is a top plan view of oneembodiment of the invention. Fig. 2 is a side elevation of the structureshown in Fig. 1. Fig. 3 is a view similar to Fig. 2, except that aportion is shown in section approximately on line 3 3 of Fig. 1. Fig. 4is a transversesectional view through Fig. 1 on line 1- 4. li'ig. 5 is adiagrammatic View of the engine shown in Fig. 1. Fig. 6 is a det-ailsectional view on line 6-6 of Fig. 1.

In forming an engine embodying the invention a framework is provided inwhich is arranged a plurality of cylinders rigidly connected in pairsand adapted to reciprocate in suitable ways or slide bearings. Each pairof these cylinders is connected to a connecting rod or bar which in turnis connected to the wrist pin of a crank arm. The crank arms areconnected with a power shaft which carries a power wheel andeccentric-s, the eccentrics being associated with means which operatesteam controlling valves positioned preferably between the cylinders.The steam controlling valves are connected with hollow stationary pistonrods having pistons mounted on one end thereof, the cylinder operatingover the pistons. By this arrangement steam is admitted into therespect-ive cylinders from stationary piston rods at the proper time foractuating the cylinders.

In order that the invention may be more fully understood an embodimentof the invention is shown in the accompanying drawings, in which- 1indicates a foundation of any desired kind, on which the framework 2 ismounted. The framework 2 comprises upper and lower bars 3, 1, 5 and 6,and suitable connecting, supporting, and bracing bars. Bars 3 and 5 areeach provided with way or slide bearings 7 and V8 respectively, whilebars t and 6 are provided `with similar ways 9 and 10. Arranged to slideor reciprocate in ways 7 and 8 and 9 and 10 are cylinders 11 and 12, and13 and 14:, respectively, the same being rigidly secured together inpairs for operating in that relationship. Each of the cylinders isclosed tightly at one end, but entirely open at the opposite end. Eachpair of cylinders are arranged so that the open ends thereof extend2in-opposite directions so as to permit the hollow piston rods 15, 16,17 and 18 to properly hold their respective pistons in position. By thisarrangement one cylinder in each pair will be exhausting while the otheris under pressure, so that no fly wheel or momentum is necessary forovercoming dead center, especially as the pistons in one pair ofcylinders are set at an angle of less than 180 from the pistons in theother pair of cylinders.

The piston rods are formed hollow and are rigidly secured to suitablebracing members inthe framework 2, and from such bracing members extendaround to slide valves 19 and 2() for receiving live steam therefrom anddischarging exhausted steam therein. The valves 19 and 20 are suppliedwith steam through openings 21 and 22 from any suitable source (notshown) The movement of slides 23 and 24 cause steam to be alternatelyadmitted into the respective piston rods and alternately exhausted outports 25 and 26. The slides 23 and 24 are connected with rods 27 and 28respectively which rods are connected with the bands 29 and 30 mountedon the eccentrics 31 and 32. The eccentrics are rigidly secured to thepower shaft 33 and are set for y properly operating the slides in timedrelationship to the action of the cylinders.

Power shaft 33 is journaled in suitable bearings mounted on `bars 5 and6, and is arranged so the ends thereof extend beyond,

the bearings for receiving cranks 34 and 35. The cranks carry suit-ablewrist pins to which one end of the connecting rods 36 and 37 areconnected, the opposite end being connected centrally of the respectivepairs of cylinders and receives motion therefrom, which motion istransmitted to sh`aft 33 through the connecting rods, said wrist pinsand cranks 34 and 35. A power wheel 38 is secured to shaft 33, fromwhich power may be taken whenever desired.

It will be noted that the cylinders are the'moving parts actuated by thesteam dithe steam at any desired time for causing the proper expansionof steam under varying conditions as may be desired.

What I claim is:

In an engine of the class described, a power shaft, a plurality ofreciprocating cylinders arranged in pairs, means for connecting eachpair of said cylinders with said power shaft for rotating the same, thecylinders of each pair of cylinders having open ends extending inopposite directions, stationary hollow piston rods extending in oppositedirections proj ecting linto s'aid lcylinders, a piston carried by eachof said piston rods, the pistons of one pair being disposed at an angleof less than 180o to the other pair, a valve for each pair of pistonrods controlling the entrance of steam therein, and means connectingsaid power shaft and said valve for operating the valves in proper timedrelationship to ,said cylinders for permitting steam to enter some ofsaid cylinders while exhausting from other of said cylinders.

In testimony whereof I affix my signature in the presence of twowitnesses.

MARY E. h e PARSONS,

ymark Admz'm'stmtrz'm of the ,estate of James M.

Parsons, deceased.

Vitnesses: y Y

ROBERT WV. BEACH, J. CALVIN MORGAN.

Copies of this patent may be obtained for vc cents each, by addressingthe Commissioner of Patents.

` Washington, D. C.

